Air-controlled feed system for liquids.



E. J. MOORE. AIR GONTROLLEDIEED SYSTEM FOR LIQUIDS.

APPLICATION FILED OUT. 7, 1908.

Patented June 7, 1910.

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EDWARD J. MOORE, or CLEVELAND, OHIO, ASSIGNOR 'ro s. r. BOWSER & COMPANY,

me, or roar WAYNE, INDIANA.

Specification of Letters Patent.

Patented June '7, 19M

Application filed Octobr 7, 1908. Serial No. 456,682.

I Feed Systems for Liquids, and do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an air controlled feed system for liquids, like oils in paint,

varnish, and other plants where liquids are distributed from a iven source under pressure through lines of pipes to different elevations and. wherein it is desirable that the liquid should be drained back to the source when the plant is shut down for the night or in case of fire, the return being by gravity when the requisite vent has been supplied.

In the accompanying drawings, Figure l is a side elevation of a plantor outfit complete, and Fig. 2 is anvenlarged sectional elevation of a relief valve mechanism for the compressed air, and Fig. 3 is a sectional elevationof the vent mechanism.

Heretofore it has been a common practice to employ electrical devices in apparatus of this kind to open the vents to the oil pipes or channels, but underwriters have seriously objected to such devices as being very dangerous'on account of the presence of imfiammable oils and the consequent danger of fires, and hence it has been difiicultto get thedesired insurance at rates that seemed reasonable. Hence I have eliminated all electrical contrivances from the plant and k introduced a system of atmospheric relief,

1 wise,

as will now appear. To these ends, the

plant comprises a suitable liquid tank L,

down and the pipes are drained purposely the relief valve mechanism is not operated That is to say, when the plant is shut exhaust pipe 5 by cross pipes 6 at intervals.

In these cross pipes I arrange initial rotatable valves a or their equivalent, adapted to open and close said pipes according to the position of the valves therein, and said valves a are' normally closed, as shown. Each valve is provided with arms 7 and 8,

or their equivalent, and a fusible connection 10 engages with arm or projection 7 and pipe 5 and holds the valve shut. A Wei ht 12 is attached to arm 8 and opens the va ve when fuse 10 is melted or otherwise broken. 'The fusible connection 10 can be made to yield at any abnormal temperature, and its sensitiveness is fixed according to local conditions. When a valve a is opened air will pass from pipe 4 to pipe 5 and thence down into piston chamber D beneath piston P. Said piston carries a rod 13 which projects throu h the top of said chamber into valve coupllng R beneath valve V and lifts said valve from its seat 14, thus giving a freeand direct escape for the compressed air from all the tanks and spaces open thereto. A pivoted pawl 15 on the top of piston chambers D is adapted to engage annular shoulders 16 on stem or rod 13 and hold valve V open when it has been raised from its seat. Said valve has a stem 18 and guide 19 therefor and is held on its seat by spring 20, but any equivalent of this valve construction may be adopted.

The foregoing mechanism relates to the automatic relief of air pressure on the system, but when this is done it still remains to provide vent for the oil pi es 22, so that they will drain freely an promptly to liquid tank L. One or another style or kind of vent may be provided, but I have coupled the vent in this case with the meter or measuring devices shown and described in my pending application, Serial No. 414,837, and a casing M represents the same as attached as wanted.

What I claim is 1. A liquid tank and a distributing pipe therefrom having an air vent means to maintain air pressure in said tank and meansto automatically relieve said pressure COIIlpIlSlIl initial va ve normally closed and means adapted to open said exhaust valve when said initial valve has been opened.

' 2. A liquid tank and an air pressure connection therefor comprising a storage tank and an exhaust pipe open thereto, an outgoing pipe and a return pipe connected with an exhaust valve for the air, an

eeaeao said exhaust and storage tank respectivel connections between said ipes at interva s and automatically contro ed valves in said In testimony whereof I sign this specification in the presence of two witnesses. EDWARD J. MOORE. Witnesses:

E. M; FISHER, F. O. MUssUN. 

